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Patented Aug. 26, 1919.

3 SHEETS-SHEET l.

Patented Aug. 26,1919.

3 SHEETPSHEH 2- 8. A. CONNOR.

musrolmsn. APPLICATION FILED JUNE 2?. @915- 114. cmu lllh IMAM-It'll 50.. WAIHIIIIIII. II. c.

B. A. CONNOR.

TRANSFORMER.

APPHCATEON FILED JUNE 2a. 1915.

Patented Aug. 26, 1919.

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ROBERT A. CONNOR, OF CHICAGO, ILLINOIS,

ASSIGNOR TO TKORDARSON ELECTRIC MANUFACTURING (30., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

TRANSFORMER.

Specification of Letters Patent.

Patented Aug. 26, 1919.-

npplication filed .Tune 28, 1815. Berlal No. 86,653.

To all whom it may concern:

Be it known that I, Rosnn'r A. CONNOR, a. citizen of the United States, and a. resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Transformers; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in electrical transformers, and the invention consists in the arrangement and combination of elements hereinafter specifically described and more particularly pointed out in the appended claims.

Among the objects of the invention is to provide a novel means for insulating the primary and secondary windings from each other and from the magnetic circuit structure, so arranged that insulation of a maidmum insulating efficiency will occupy a minimum space. sulation structure are more particularly adapted to that form of transformer in which the primary and secondary windings are composed of disk like units of spirally wound conductors which surround the core of the magnetic circuit, with the high tension and low tension windings subdivided or arranged in alternation on the core in parallel planes.

A further object of the invention is to provide in a structure of this general character novel means for insulating the high and low tension elements of the winding and to provide means for directing a cooling medium, such as oil in which the transformer structure may be immersed, to the windings. This latter feature of my invention is especially adapted to that type of winding shown in U. S. Letters Patent 1,259,565, Mar. 19, 1918, of Chester H. Thordarson, wherein the windings are com posed of spirally wound flat or ribbon wire with the turns insulated from each other by means which expose the edge of each turn of the winding at one or both sides thereof. This feature of my invention may, however, be applied to transformer structures wherein the windings are composed of The improvements in the inround conductorswound in layers spirally about the axis of the windings.

A further object of the invention is to provide means forexerting a tension on the turns of the Winding of this character so as to maintain them tightly wound and avoid the necessity of taping the windings.

Other objects of the invention are to improve and simplify transformer structures.

I have herein shown my improvements as applied to a so-called shell type of transformer and one in which the high and low tension windings are composed of s irally wound flat or ribbon wire. It will e understood that certain features of the invention may be adapted to the core type of transformer, and that other features of the invention. are adaptable to windings differing in their specific structure from the windings herein shown.

In the drawings Figure 1 is a side elevation of a transformer embodying my invention.

Fig. 2 is an elevation thereof in a plane at right angles to the plane of Fig. 1.

Fig. 3 is a vertical section on the line 3-3 of Fig. 1.

Fig. 4 is a vertical section on the line 4-4 of Fig. 2.

Figs. 5 and 6 are edge elevations of disks constituting insulating elements employed in the transformer structure.

Fig. 7 is a section insulating element.

Fig. 8 is a sectional detail of one of the terminal elements of the low tension wind- Fig. 9 is a diagram of one practical mode of connecting the high and low tension windings.

As shown in the drawings, 10 designates as a whole the magnetic circuit of the transformer. It comprises a series of superposed sheet plates of thin metal and, as herein shown, it is made up of a plurality of T-shaped plates 11 and L-shaped plates 12, with the members 14 of the T-shaped constituting the core, as most clearly shown in Fig. 4. In practice, the T-shaped and L- shaped plates are arranged in alternation, so that the joints occurring between one set of plates are bridged over by overlap-ping portions of adjacent sets of plates to thereby of a modified form of shown as produced by providin lthe i nsulating disks 29 on their side aces with flat spacing projections 35,- 36 which are adapted to bearagainst the fiat faces of adjacent windings in the manner clearly shown in Figs. 1, 3 and 4. The projections; 35 which are engaged with the corner portions of. the windings are e10 ated so asto. extend diagonal y across 1: e windings from theinner to the outer sides thereo;f, gwhil 1e the projections 36 are smaller and laterally separated. The arrangement of, said. projections is such I as to provide uninterrupted passage for the cooling medium along or in contact with all parts ofthefaces of the coils conti uous to the said spacing projections. aid arrangement vof the said projections is also such as to brace thecoils against lateral distortion. The spacing pro'ections thus described constitute an excee ingly com act method of producing conduits for directing the cooling medium along the sides of the windings. As herein shown, but one side of each windin faces a cooling medium conduit, so that lint one edge of each turn of each winding is exposed to the action of the cooling medium. If desired, however, all of the disks may be provided with spacin projections to prodnce at each side of eacfi winding a conduit for the passage of a cooling medium, whereby bothedges of each turn of each winding ma be thus subjected to the action of the coo ing medium. 7

As shown. in Figs. 5 and 6, the central tubular insulating flanges 30. ofthe disks 29 are made, integral with the bodies of the disks. In Fig. 7 I have shown a construction in which the central tubular flange 38 is made a part separate from the disk 29. It extends through the central opening of said diskand iseattached to the disk by means of a flanged portion 39 which fits flat against one face ofthe disk around said central opening and is glued or otherwise permanently secured thereto a v As a furtherand feparate improvement in transformer structures. wherein. the windings aremade up ofspirall wound conductors to produce flat or disk-like units, means are, provided for, maintaining the windings or coil sections compactly wound without the necessity of applyin taping over the side members o the co' s as has heretofore been ,a common practice. The use of the taping to stifienfl the winding structure is objectionable to the extent that it excludes accessof th cooling medium to the turns of the winding. The means herein shown for efiecting. this resultc comprise means for lacing the ,terminals of each winding un er" tensionso as to prevent the outermost turns from loosening or: unwindin v v inst referring to the high tension w1nd ings, it will be noted that the terminals 4-2 are carried upwardli l from the windings and are attached to t e lower ends of binding posts 13 which latter extend upwardly through openings in a terminal board 44 made of msulatin material. he terminals42 of the win ings may be soldered or otherwise fixedly secured to the binding upon the core they are reversed with respect to their spiral directions of windin and adjacent terminals 42 of the win ings, are trained oppositely about the sleeves 4,6 so that when the terminals 42 are tensioned the stress exerted thereupon is in a direction to tiglhten the windings. he terminals 48 of the low tension windings are in like manner trained upwardly about a sleeve 49 which is mounted on a shaft 50 which extends between the frame ieces 15 at one side of the transformer rams In the present instance each turn of the low tension winding is made up of two or more wire ribbons 1n order to pro vide the describedcross section and at the same time, to make the turns sufli cientl flexible to permit them to be readily woun The said terminals 48 extend at their upper ends into metallic bushings 51 which extend upwardly through openings in an insulating terminal board 2, The upper ends of the said bushings are screw-threaded tofreceifre nuts 53 by which tension strainsare' exerted on thewindin terminals to pre ent them unwi in e i i term n &8 we connected to the bushings by means of short metallic pins. 55 which extend through registermg openings in the e utreme ends of the terminals and the walls of the bushings, as most clearly shown in Fig.8. The external lead wires 56 may be connected to 'thebush- 111 H anysui'table manneri As s own in 8 the connection is a soldered one H he aid. r manbo r s 44 e d 5 a seated upon the upper ends of the flanges 17 offtlie transformer frame, which flanges are terminated-short of the top of'the trans and the boards are fastened former frame,

of book bolts 57, as

to the flanges b means best shown in 1g. 1. y

The coil structure thus grouped may be confined or held together by means 'of of said windings in the direction of their spiral turns to thereby maintain the windings closely wound.

10. In a transformer, a winding composed of a spirally wound flat ribbon wire with insulation between the turns thereof, and means to maintain said winding compact, comprising means to exert tension on the terminal of the winding.

11. In a transformer a magnetic core, a

series of disk like windings thereon composed of spirally wound conductors, a terminal board through which the terminals of said windings extend, and means associated with said terminal board and said terminals to exert a winding tension on said windings, for the purpose set forth.

12. A transformer comprising a core, sidewise disposed, disk-like subdivided high and low tension windings thereon, and thin insulatin elements surrounding the core between t e windings and certain of which are formed at their inner and outer edges with ri ht angle flanges to continuously embrace tEe inner and outer edges of the windings to increase the insulating barrier between the windings, certain of the disks being formed to rovide between the same and adjacent win ings conduits for the circulation of a cooling medium.

13. In a transformer, a fiat insulating disk to separate winding units and having a central opening to fit around the core and provided around said opening with a rightangle flange and on its fiat face with interspaced, relatively small area winding unit sustaining and conduit forming rojections.

14. In a transformer, an insu ating disk to separate winding units and having a central opening to fit around the core, and provided around said opening with a right angle flange, said disk being provided about its periphery with a like flange, and provided on its flat face with interspaced relatively small area-windin unit sustaining and conduit forming ro ections.

In testimony, that I claim the foregoing as my invention I ailix my signature in the presence of two witnesses, this 29th day of May, A. D. 1915.

ROBERT A. CONNOR.

Witnesses:

WILLIAM L. HALL, G. E. Downs.

flnpies 01' this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O. 

